# A009649 (b-file synthesized from sequence entry)
0 0
1 1
2 -1
3 1
4 -12
5 35
6 -195
7 1979
8 -13552
9 131333
10 -1540845
11 16920341
12 -219934044
13 3138657015
14 -46097651327
15 745768998623
16 -12886218266880
17 233789283755465
18 -4532667637516281
19 92739558324236905
20 -1991654643609977740